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首页> 外文期刊>Atmospheric chemistry and physics >Estimation of Asian dust aerosol effect on cloud radiation forcing using Fu-Liou radiative model and CERES measurements
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Estimation of Asian dust aerosol effect on cloud radiation forcing using Fu-Liou radiative model and CERES measurements

机译：利用傅利欧辐射模型和CERES测量估算亚洲粉尘气溶胶对云辐射强迫的影响

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The impact of Asian dust on cloud radiative forcing during 2003–2006 isstudied by using the Clouds and Earth's Radiant Energy Budget Scanner(CERES) data and the Fu-Liou radiative transfer model. Analysis of satellitedata shows that the dust aerosol significantly reduced the cloud coolingeffect at TOA. In dust contaminated cloudy regions, the 4-year mean valuesof the instantaneous shortwave, longwave and net cloud radiative forcing are−138.9, 69.1, and −69.7 Wm−2, which are 57.0, 74.2, and 46.3%,respectively, of the corresponding values in pristine cloudy regions. Thesatellite-retrieved cloud properties are significantly different in thedusty regions and can influence the radiative forcing indirectly. Thecontributions to the cloud radiation forcing by the dust direct, indirectand semi-direct effects are estimated using combined satellite observationsand Fu-Liou model simulation. The 4-year mean value of combination of dustindirect and semi-direct shortwave radiative forcing (SWRF) is 82.2 Wm−2, which is 78.4% of the total dust effect. The dust directeffect is only 22.7 Wm−2, which is 21.6% of the total effect.Because both first and second indirect effects enhance cloud cooling, theaerosol-induced cloud warming is mainly the result of the semi-direct effectof dust.
机译：通过使用云和地球的辐射能预算扫描器（CERES）数据和傅利欧辐射转移模型，研究了2003-2006年亚洲尘埃对云辐射强迫的影响。卫星数据分析表明，粉尘气溶胶显着降低了TOA处的云冷却效应。在受粉尘污染的多云地区，瞬时短波，长波和净云辐射强迫的4年平均值为−138.9、69.1和−69.7 Wm -2 ，分别为57.0、74.2和46.3分别为原始多云区域中相应值的％。卫星尘埃云特性在尘土飞扬的地区显着不同，并且可以间接影响辐射强迫。结合卫星观测和Fu-Liou模型模拟，估算了扬尘直接，间接和半直接作用对云辐射强迫的贡献。间接尘埃和半直接短波辐射强迫（SWRF）组合的4年平均值为82.2 Wm -2 ，占总尘埃效应的78.4％。尘埃的直接效应仅为22.7 Wm −2 ，占总效应的21.6％。由于第一和第二种间接效应都增强了云团的冷却作用，气溶胶引起的云团变暖主要是半灰尘的直接作用。

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